中文摘要：

阐述了一种新型三极交流磁轴承的基本结构与工作原理,用等效磁路法推导了其悬浮力数学模型.针对三极交流磁轴承在两相静止坐标系下数学模型的强耦合特性,采用逆系统方法将其解耦为伪线性系统,为了避免建模误差和外部干扰所引起的系统性能恶化,使用内模控制方法来对伪线性系统进行综合.仿真试验表明这种解耦控制策略不仅实现了三极交流磁轴承径向位移之间的动态解耦,使得转子能够稳定悬浮,而且系统具有良好的动静态性能和鲁棒性.

英文摘要：

The basic configuration and working principle of an innovative three-pole AC（alternating current） magnetic bearing are introduced.Using equivalent magnetic circuit method,the mathematical model of the suspension forces is deduced.Aiming at the coupling identity of the mathematical model of the three-pole AC magnetic bearing in two-phase static coordinates,a pseudo-linear model is given based on the inverse system method.In order to avoid the system performance deterioration due to the model error and the external disturbance,the internal model control method is applied to synthesizing the pseudo linear system.The simulation experiments show that this kind of decoupling control strategy can realize dynamic decoupling control between radial displacements of the three-pole AC magnetic bearing,the rotor can be suspended steadily and the whole control system has good dynamic and static performance and good robustness.